Bash fournit pas mal d'outils intégrés (pas besoin de se prendre la tête avec sed, awk et PERL) .
johand@horus:~/src/bash$ brol=un.deux.trois
johand@horus:~/src/bash$ echo ${brol%.*}
un.deux
johand@horus:~/src/bash$ echo ${brol%%.*}
un
D'accord, ce n'est pas portable à 100% :(
man bash
${parameter%word}
${parameter%%word}
The word is expanded to produce a pattern just as in pathname
expansion. If the pattern matches a trailing portion of the
expanded value of parameter, then the result of the expansion is
the expanded value of parameter with the shortest matching pat-
tern (the ``%'' case) or the longest matching pattern (the
``%%'' case) deleted. If parameter is @ or *, the pattern
removal operation is applied to each positional parameter in
turn, and the expansion is the resultant list. If parameter is
an array variable subscripted with @ or *, the pattern removal
operation is applied to each member of the array in turn, and
the expansion is the resultant list.
Gates gave you the windows.
GNU gave us the whole house.(Alexandrin)